Crank shaft



NOV. 12, 1929. R, WORDEN 1,735,707

' @RANK-SHAFT Filed Nov. 5o, 1927- :VT N

ATTOR N EY Patented Nov. l2, 1929 ROBERT WORDEN, OF LANSING, MICHIGANCRANK SHAFT Application led November 30, 1927. Serial No. 236,872.`

The present invention relates to crank shafts and has for its objects toprovide a a crank shaft upon which the crank arm bearings may be slidinto operative position thereon or disznounted therefrom without in anyway changingv the construction of the crank shaft.V j

Further objects are to faciiitate the mounting and dismounting of ballbearings or frictionbearings upon the crank shaft without changing theconstruction of said crank shaft.

Other objects are simplicity of construction, cheapness of manufactureand effective'- ness in use and in construction.

Other objects and advantages will appear from the subjoinedspecification and will be set forth in the appended claim. In thedrawings Figure 1 represents a portion of a crank shaft in accordancewith my invention and illustrating all the inventive features connectedtherewith.

Figure 2 is a section on line 2-42 of Figure 1 looking in the directionof the arrows and showing the connection'of the crank arm with the crankshaft on an enlarged scale.

Figure 3 is a fragmentary view of a portion of the crank shaft showingone of the col- 3o lars attached to the crank shaft.

Referring to the drawings in detail, 1() designates the crank shaft, 11are pitmen operated thereby, 12 is a housing secured to the crank case13 and provided with ball bearings and with thrust ball bearings forholdarms 11, said housing having apertures at 28 for the receptiontherethrough ofthe crank arm 10. Portions of the crank arms arerotatably mounted in the journaled boxes 12l having anti-frictionbearings 26 such as de- 55 scribed above therein and thrust bearings 29comprising a thrust collar 30 and a thrust element 31 on either side ofthe thrust ball bearings 29 to prevent endwise movement on the 6o Theassembly of the device is as follows: l/Vhen it is desired to placecrank arms with bearings as described above on the crank shaft, thebearings are 'first slid from one end of the `cra-nk arm thereon pastone end ofthe curved 65 portions v15-17 -18-19- and 20 into position onthe respective crank portions 22 whi-ch are flattened as stated above.The crank arms are then secured to the bearings in the usual manner byattaching the parts 32 and 33 together about said bearings by means ofbolts 34. Disassembly of these parts, of course, would be the reversemovement thereon and would be accomplished in asimilar manner. Havingdescribed my invention, what I claim isf:- l v A crank shaft round insection having bends forming multiple cranks,r fixed collars in thecranks, divided pitmen having circular flanges overlapping the peripheryof the 80 collars, and ball bearings housed in the pitmen to formantifriction bearing on the collars.

In testimony whereof I affix my signature.

ROBERT WORDEN.

ing the crank in place. The crank 10 isV formed with a plurality ofcrank portions 14 and 15 extending in opposite directions, the

bends thereof being in the form of curves 16,A

40 17, 18, 19 and 2O so that the eyes 2l of the pitmen may be readilyslid past the bends and into position on the fiattened portion 22 of thecrank, said flattened portions being provided with raised collars 23secured thereto against rotary or longitudinal movement thereon. Mountedupon said collars are rings 24 which lit snugly thereupon againstmovement relative thereto, said rings forming with rings 25 raceways forthe ball bearings 26 within the housing 27 at the ends of the crank

